FLANGED JOINT OF WELLHEAD EQUIPMENT Russian patent published in 2001 - IPC

FIELD: mining, particularly, oil and gas producing industry; applicable in designing of new flanged joints of wellhead equipment, main pipelines and high-pressure hydraulic systems. SUBSTANCE: flanged joint has sealing ring installed between flanges in grooves with conical surfaces. Sealing ring is made of flexible material with allowance for deformation and consideration of presence of additional ring. The latter is made of metal and connected with sealing ring of flexible material. Additional ring has concentric conical symmetrical shoulders located on ring internal part for centering of grooves in contact with their conical surfaces. External part of additional ring is made flat for support of flange end surfaces beyond groove limits and serves as closing link in joint member. EFFECT: simple in manufacture and reliable in service flanged joint of wellhead equipment. 1 dwg